Surge protectors guard against transient overvoltages, sometimes called transients, spikes or surges, hence the name Transient Voltage Surge Suppressor or TVSS.  Transients are known to damage sensitive electronic equipment in homes, schools, commercial, industrial and medical facilities, wastewater treatment plants, factories, etc.  Transient overvoltages come from lightning and utility operations as well as internal actions such as motors cycling on and off.  Transients have always been with us, however modern microelectronic loads tend to be sensitive to them.  The downtime, damage and destruction caused to critical or electronic loads cost billions of dollars a year.

APT’s specialty is hardwired TVSS that connects to electrical distribution gear in single, two pole, and three phase power systems.  Typically, a TVSS connects via a breaker and protects the entire load fed from that panel.  Most TVSS are comprised of Metal Oxide Varistors (MOVs) and capacitive EMI/RFI noise filters.  UL 1449 is an important safety and performance standard included in every APT product certification. More ...